Shaft Height: Approx. 6'' Tall. Designed with the iCS Adjustable Comfort Technology, the women's Delta Nitro will perform at a top level for you. The iCS disk allows you to customize the comfort of your boots to your liking. In addition, this boot features an EVA midsole with TPU stabilizer to also aid in your comfort while the slip resistant rubber outsole keeps you on your feet. There is nothing more to ask for in a work boot. Full-grain leather and mesh upper.